Discussion
Ohmic conductor among the following is _____.
Answer: C
Constantan is the ohmic conductor.
An ohmic conductor obeys \(V = IR\) with a constant resistance, so its V-I graph is a straight line. Constantan, a copper-nickel alloy, is prized because its resistance hardly changes with temperature. A transistor, an electrolyte and a thermistor are all non-ohmic.
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